This file is indexed.

/usr/share/spamassassin/23_bayes.cf is in spamassassin 3.4.1-8build1.

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The actual contents of the file can be viewed below.

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# SpamAssassin basic config file
#
# Please don't modify this file as your changes will be overwritten with
# the next update. Use @@LOCAL_RULES_DIR@@/local.cf instead.
# See 'perldoc Mail::SpamAssassin::Conf' for details.
#
# <@LICENSE>
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to you under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at:
# 
#     http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# </@LICENSE>
#
###########################################################################

require_version @@VERSION@@

###########################################################################

ifplugin Mail::SpamAssassin::Plugin::Bayes

body BAYES_00		eval:check_bayes('0.00', '0.01')
body BAYES_05		eval:check_bayes('0.01', '0.05')
body BAYES_20		eval:check_bayes('0.05', '0.20')
body BAYES_40		eval:check_bayes('0.20', '0.40')

# note: tread carefully around 0.5... the Bayesian classifier
# will use that for anything it's unsure about, or if it's untrained.
body BAYES_50		eval:check_bayes('0.40', '0.60')

body BAYES_60		eval:check_bayes('0.60', '0.80')
body BAYES_80		eval:check_bayes('0.80', '0.95')
body BAYES_95		eval:check_bayes('0.95', '0.99')
body BAYES_99		eval:check_bayes('0.99', '1.00')

#Additional rule to add more of a score to BAYES_99 FOR 99.9% to 100%
body BAYES_999		eval:check_bayes('0.999', '1.00')

tflags BAYES_00		nice learn
tflags BAYES_05		nice learn
tflags BAYES_20		nice learn
tflags BAYES_40		nice learn
tflags BAYES_50		learn
tflags BAYES_60		learn
tflags BAYES_80		learn
tflags BAYES_95		learn
tflags BAYES_99		learn
tflags BAYES_999	learn

describe BAYES_00	Bayes spam probability is 0 to 1%
describe BAYES_05	Bayes spam probability is 1 to 5%
describe BAYES_20	Bayes spam probability is 5 to 20%
describe BAYES_40	Bayes spam probability is 20 to 40%
describe BAYES_50	Bayes spam probability is 40 to 60%
describe BAYES_60	Bayes spam probability is 60 to 80%
describe BAYES_80	Bayes spam probability is 80 to 95%
describe BAYES_95	Bayes spam probability is 95 to 99%
describe BAYES_99	Bayes spam probability is 99 to 100%
describe BAYES_999      Bayes spam probability is 99.9 to 100%

endif